I think that's the only response - jump over FF to something bigger. Much as I adore my X-E1, the IQ of medium format film still beats it into a cocked hat. However, that's the only advantage, although a pretty serious one. The baggage is expense and inconvenience.

With this way of thinking, Fuji could break the FF holy grail and rewrite the rules once again. Whether such a thing would be commercially viable is the biggest question. Heck, I don't even know if they're finding the X series commercially viable.

Since Fuji have a history with medium format At some point I could see them jumping over full farme and making a camera with a slightly larger sensor, maybe the size of the one in the Leica S2. A true medium format system would probably be too big and expensive, and have a pretty limited market.